The invention provides a multifunctional ventilation air-conditioning fan which is used for air wetting and cooling or energy recovery and ventilation of an air-conditioning room. The multifunctional ventilation air-conditioning fan comprises a machine shell (10), a fan component (20), a ventilated carrier (30) of a medium for heat exchange or water certain for water evaporation, an air distributing device (40), a water supply system (50) and an electronic control component (60); a fresh air inlet (11), an air outlet (14), an air distributor (12) and a return air inlet (13) are arranged on the wall of the machine shell; the ventilated carrier is made of air filtering cotton comprising outlast containing a phase-change substance, wherein the phase change temperature of the phase-change substance is between the indoor temperature and the outdoor temperature of the air-conditioning room, the phase-change substance generates solid-liquid phase change when heated or cooled, the phase change can absorb or release large amount of latent heat, and therefore, large amount of heat energy can be transmitted between two flows of heat exchange air. The invention can be implemented in the structure types of a rotary valve type, a rotating wind channel type, a scroll type and a rotating wheel type and has the advantages of simple structure, low production cost and multiple functions of energy saving and ventilation, cooling and air wetting and fresh air purification; and moreover, the multifunctional ventilation air-conditioning fan can completely replace an air conditioner in a dry area and greatly save equipment investment and operation cost, therefore the multifunctional ventilation air-conditioning fan is an economical, environment friendly, high-efficiency and energy-saving product and has high social and economic benefits.